#include <iostream>

using namespace std;

int main()
{
	char ch;
	int aCnt=0;
	int eCnt=0;
	int iCnt=0;
	int oCnt=0;
	int uCnt=0;

	while(cin>>ch)
	{
		switch(ch)
		{
		case 'a':
			++aCnt;
			break;
		case 'e':
			++eCnt;
			break;
		case 'i':
			++iCnt;
			break;
		case 'o':
			++oCnt;
			break;
		case 'u':
			++uCnt;
			break;
		}
	}
	cout<<"number of a: "<<aCnt<<endl
		<<"number of e: "<<eCnt<<endl
		<<"number of i: "<<iCnt<<endl
		<<"number of o: "<<oCnt<<endl
		<<"number of u: "<<uCnt<<endl;
	return 0;

}